A creation of Dr. Gero's, he was assembled using the DNA from the best fighters in the universe. The project was taking too long, and he abandoned the project. However, Dr. Gero's computer remained working, even after his death. Cell was completed a few years after Mirai Trunks had destroyed #17 and #18 in his time, which Cell needed to absorb to become "perfect." Seeing there was no solution to this problem in his time, Cell murdered Trunks and traveled back to when the androids still existed. Cell eventually finds what he's looking for, and goes perfect. He holds a game where he challenges anyone in the world to fight him, or else the Earth would be destroyed. Cell is killed by Gohan with a one-handed Kame Hame Ha.